<template>
  <!-- 顶部内容, 书写在这里, 通过传送门(teleporter) 放在顶部内 -->
  <teleport to=".header">
    <SdyHeader @searchText="searchHandler" center="search" right="search"/>
  </teleport>

  <div class="sdy-search">
    <div v-if="searchList.length" class="search-list">
      <div class="top">
        <div class="title">最近搜索</div>
        <van-icon name="delete-o" @click="delHandler" />
      </div>
      <ul class="bottom">
        <li @click="clickHandler(item.keyword)" v-for="item in searchList" :key="item.wordid">{{ item.keyword }}</li>
      </ul>
    </div>
    <div class="search-list hot-search">
      <div class="top">
        <div class="title">最近搜索</div>
        <span @click="hotSearchIsShow = !hotSearchIsShow">{{ hotSearchIsShow ? '隐藏' : '显示' }}</span>
      </div>
      <ul v-if="hotSearchIsShow" class="bottom">
        <li @click="clickHandler(item.keyword)" v-for="item in hotSearchList" :key="item.wordid">
          {{ item.keyword }}
        </li>
      </ul>
      <div v-else class="not">
        已隐藏搜索发现
      </div>
    </div>

    <ul v-if="searchListIsShow" class="search-list-box">
      <li @click="clickHandler(item.brand)" v-for="item in searchContentList" :key="item.proid">
        <div class="title">
          {{ item.brand }}
        </div>
        <div class="tag">
          {{ item.category }}
        </div>
      </li>
    </ul>
  </div>
</template>

<script name="sdySearch" lang="ts" setup>
import SdyHeader from '../../components/header.vue'
import { ref, onMounted } from 'vue'
import { useRouter } from 'vue-router'
import { getHotSearchList, getSearchList } from '../../model/goods'

const $myRouter = useRouter()

// 定义接口
interface SearchGoodsInfo {
  num?: number
  keyword?: string
  wordid?: string
}

interface GoodsInfo {
  img1?: string
  proid?: string
  proname?: string
  originprice?: number
  discount?: number
  [key: string]: any
}

interface Response<T> {
  code: string
  data: Array<T>
}

// 定义变量决定搜索框输入文本以后, 搜索列表盒子是否显示
const searchListIsShow = ref<boolean>(false)

// 定义变量, 决定热门搜索盒子是否显示
const hotSearchIsShow = ref<boolean>(true)

// 定义变量, 保存热门搜索列表
const hotSearchList = ref<Array<SearchGoodsInfo>>([])

// 获取热门搜索列表
const getHotSearchListHandler = async () => {
  const res = await getHotSearchList()
  if ((res as unknown as Response<SearchGoodsInfo>).code !== '200') return
  res.data.forEach((item: SearchGoodsInfo) => {
    // 如果有 keyword 关键字, 那么就添加到 hotSearchList 内
    item.keyword && hotSearchList.value.push(item)
  })
}

// 准备一个变量表示最近搜索列表
const searchList = ref<SearchGoodsInfo[]>([])

// 从 localStorage 内拿到最近搜索列表
const getSearchListHandler = () => {
  const res = JSON.parse(window.localStorage.getItem('searchList') || '[]')
  searchList.value = res as SearchGoodsInfo[]
}

// 准备一个变量, 表示搜索内容列表
const searchContentList = ref<Array<GoodsInfo>>([])

// 实现实时搜索操作
const searchHandler = async (str: string) => {
  // 发送请求, 请求对应内容渲染列表
  if (!str.trim()) {
    searchContentList.value = []
    searchListIsShow.value = false
    return
  }
  const res = await getSearchList(str)
  if ((res as unknown as Response<GoodsInfo>).code !== '200') return
  searchContentList.value = res.data
  // 让搜索列表显示出来
  searchListIsShow.value = true
}

// 点击跳转
const clickHandler = (str?: string) => {
  // 把搜索关键字存储到数组内
  for (let i = searchList.value.length - 1; i >= 0; i--) {
    const index = searchList.value.findIndex(item => {
      return item.keyword === str
    })
    if (index !== -1) {
      searchList.value.splice(index, 1)
    }
  }

  searchList.value.unshift({
    wordid: Math.random.toString().slice(-8),
    keyword: str
  })

  window.localStorage.setItem('searchList', JSON.stringify(searchList.value))

  // 跳转连接
  $myRouter.replace({ path: '/list', query: { keyword: str } })
}

// 删除事件
const delHandler = () => {
  window.localStorage.removeItem('searchList')
  searchList.value = []
}

onMounted(() => {
  getHotSearchListHandler()
  getSearchListHandler()
})
</script>

<style scoped lang="scss">
.sdy-search {
  width: 100%;
  height: 100%;
  background-color: #F6F6F6;
  position: relative;

  > .search-list {
    padding: 10px;
    background-color: #fff;

    > .top {
      height: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 16px;
      margin-bottom: 10px;
    }

    > .bottom {
      display: flex;
      flex-wrap: wrap;

      > li {
        padding: 5px 15px;
        background-color: #F6F6F6;
        border-radius: 5px;
        margin: 0 8px 10px 0;
        font-size: 12px;
      }
    }

    > .not {
      height: 100px;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
}

.search-list-box {
  padding: 10px;
  background-color: #fff;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  box-sizing: border-box;

  > li {
    height: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;

    > .tag {
      font-size: 12px;
      padding: 5px 10px;
      border-radius: 5px;
      background-color: #F6F6F6;
    }
  }
}
</style>
